JP2001082824A - Absorption refrigerator - Google Patents

Abstract

(57) [Abstract] [Problem] To save energy by improving the performance of an absorber. SOLUTION: An evaporator 6 and an absorber 7 each provided with a plurality of isolated space portions in a vertical direction, and a refrigerant vapor evaporated in each space portion of the evaporator 6 is provided in each space portion of the absorber 7. In an absorption refrigerator having a low-temperature body 8 juxtaposed so as to be able to flow in, water in a cold water pipe 20 is filled with the space portions 6a, 6a of the evaporator 6.
b, 6c, the refrigerant is pumped by the refrigerant pump 19, and is cooled by evaporation of the refrigerant liquid sequentially scattered on the heat transfer tubes 20c, 20b, 20a. Heat transfer tubes 21a, 21b, 11c and spreaders 13a, 13c are also provided for each of 7a, 7b, 7c.
b and 13c are set in correspondence with each other so that the cooling water of the cooling water pipe 21 flows in the order of the heat transfer pipes 21a and 21b, and the absorbent discharged from the space portion 7a reaches the high temperature regenerator 1 via the heat transfer pipe 11c and the like. Liquid pipe 11 is connected to the low temperature regenerator 3
From the heat transfer tubes 11c, 21b, 21
a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an absorption refrigerator.

[0002]

2. Description of the Related Art A heat transfer tube through which a rare absorbing liquid supplied from an absorber to a high-temperature regenerator is installed above a heat transfer tube through which a cooling water of an absorber flows, and a concentrated tube supplied from the low-temperature regenerator and sprayed. By lowering the temperature of the absorbent and increasing the absorption of refrigerant vapor by the concentrated absorbent, the temperature of the diluted absorbent flowing into the high-temperature regenerator is increased, reducing the amount of heating required by the high-temperature regenerator and reducing fuel costs. An absorption chiller designed to reduce the amount is proposed in, for example, Japanese Patent Application Laid-Open No. H10-197092.

[0003]

In the above conventional absorption refrigerator, the flow rate of the rare absorbing liquid supplied from the absorber to the high-temperature regenerator by the absorbing liquid pump is controlled by the cooling water supplied to the absorber and the like. Since the flow rate is much smaller than the flow rate, the diameter of the heat transfer tube for the rare absorbing liquid installed on the upper side of the absorber is much smaller than the diameter of the heat transfer tube for the cooling water installed on the lower side. However, since there is only one device for spraying the concentrated absorption liquid supplied from the regenerator on these heat transfer tubes,
There was a problem that both heat transfer tubes could not be uniformly wet at the same time, and sufficient heat exchange could not be performed inside or outside one or both heat transfer tubes.

In addition, since the heat transfer tubes through which the rare absorbing liquid and the cooling water flow are installed in the same space, the refrigerant vapor flowing from the evaporator flows toward the heat transfer tube which is likely to have high performance, and the other heat transfer tube On the other hand, it is difficult to supply the refrigerant vapor. For this reason, the absorption action of the refrigerant vapor by the concentrated absorbing liquid is biased, and there is also a problem that the performance of the entire absorber is not sufficiently obtained despite the complicated configuration, and these are problems to be solved. Had become.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems of the prior art, the present invention is characterized in that a plurality of spaces for absorbing refrigerant vapor supplied from an evaporator into an absorbent supplied from a regenerator are isolated. A heat transfer tube which is disposed in the vertical direction and in which the absorbing liquid discharged from the lowermost space and supplied to the high-temperature regenerator flows inside has a multistage absorber provided in the uppermost space. The absorption type refrigerator of the first configuration,

[0006] In the absorption refrigerator of the first configuration,
The multi-stage absorber has the three-stage space portion, and the refrigerant vapor flows into the absorber from the evaporator through the upper space portion formed in the upper space portion and separated into three stages of the evaporator. The heat transfer tube and the spraying means for spraying the absorbing liquid supplied from the regenerator on the heat transfer tube are provided in the upper space portion of the multiple-stage absorber, and the upper space portion of the evaporator is provided. An absorption refrigerator having a second configuration in which a heat transfer tube through which a fluid to be cooled flows is provided, and a refrigerant liquid sprayed on the heat transfer tube is evaporated.

[0007] In the absorption refrigerator of the first configuration,
The multi-stage absorber has the above-mentioned three-stage space portion, and refrigerant vapor flows from the evaporator into the absorber through the middle-stage space portion formed in the middle-stage space portion and separated into three stages of the evaporator. A plurality of absorbers are arranged as possible, and in the middle space portion of the multi-stage absorber, the cooling water flows through the inside of the absorber, and the absorbing liquid supplied by absorbing the refrigerant from the upper space portion is sprayed on the heat transfer tubes. A third means is provided in which a spraying means is provided, and a heat transfer tube through which a fluid to be cooled flows is provided in a middle space portion of the evaporator, and a refrigerant liquid supplied and sprayed from the upper space portion evaporates on the heat transfer tube. An absorption refrigerator having the configuration of

[0008] In the absorption refrigerator of the first configuration,
The multi-stage absorber has the three-stage space portion, and the refrigerant space flows into the absorber from the evaporator into the lower space portion of the space portion formed in the lower space portion by being separated into three stages of the evaporator. A plurality of absorbers are arranged as possible, and a cooling water flows through the lower space portion of the multi-stage absorber together with a heat transfer tube, and an absorbing liquid supplied by absorbing the refrigerant from the middle space portion is sprayed on the heat transfer tube. A fourth means in which a spraying means is provided, and a heat transfer tube through which a fluid to be cooled flows is provided in a lower space portion of the evaporator, and a refrigerant liquid supplied and sprayed from the middle space portion evaporates on the heat transfer tube. An absorption refrigerator having the configuration of

[0009] In the absorption refrigerator of the first configuration,
The multi-stage absorber has the three-stage space portion, and the upper space portion formed in the upper space portion and the middle space portion and separated into two stages of the evaporator is transferred from the evaporator to the absorber. Arranged in parallel so that refrigerant vapor can flow in, and in the upper space of the multi-stage absorber, along with the heat transfer tube, dispersing means for spraying the absorbing liquid supplied from the regenerator on the heat transfer tube is provided. Along with a heat transfer tube through which cooling water flows in the middle space portion of the type absorber, dispersing means for absorbing the refrigerant supplied from the upper space portion and spraying the absorbing liquid onto the heat transfer tube is provided, An absorption refrigerator having a fifth configuration in which a heat transfer tube in which the fluid to be cooled flows is provided in the upper space portion, and a refrigerant liquid sprayed on the heat transfer tube is evaporated;

[0010] In the absorption refrigerator of the first configuration,
The multi-stage absorber has two stages of the space, and the upper space and the lower space formed in the upper space and the lower space are separated into two stages of the evaporator. And a means for dispersing the absorbing liquid supplied from the regenerator on the heat transfer tubes together with the heat transfer tubes in the upper space of the multi-stage absorber. In the lower space portion of the multi-stage absorber, together with a heat transfer tube through which cooling water flows, there is provided a spraying means for absorbing the refrigerant supplied from the upper space portion and absorbing the supplied coolant onto the heat transfer tube. A heat absorbing pipe having a sixth configuration in which heat transfer tubes through which the fluid to be cooled flows is provided in the upper space portion and the lower space portion of the evaporator so that the refrigerant liquid sprayed on these heat transfer tubes evaporates. A refrigerator,

In the absorption refrigerator having the first to sixth configurations, the fluid to be cooled is such that the fluid to be cooled flows into the evaporator from the lower space portion and is discharged through the space portion above the evaporator. And an absorption refrigerator having a seventh configuration in which the above path is provided.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to an absorption refrigerator using water as a refrigerant and an aqueous solution of lithium bromide (LiBr) as an absorption liquid.

[First Embodiment] A first embodiment will be described with reference to FIGS. 1 is a gas burner 2
A high-temperature regenerator configured to heat the absorption liquid by the thermal power of the above to evaporate and separate the refrigerant, 3 is a low-temperature regenerator, 4 is a condenser, and 5 is a high-temperature regenerator in which the low-temperature regenerator 3 and the condenser 4 are housed. Body, 6 is an evaporator, 7 is an absorber, 8 is an evaporator 6 and an absorber 7
Is a low temperature body, 9 is a low temperature heat exchanger, 10 is a high temperature heat exchanger, 11 to 13 are absorption liquid tubes, 14 is an absorption liquid pump, 15 to 18 are refrigerant tubes, 19 is a refrigerant pump, and 20 is a refrigerant pump. A cooling water pipe 21 is a cooling water pipe.

The evaporator 6 and the absorber 7 constituting the low-temperature body 6 of the absorption refrigerator are internally divided into three stages as shown in an enlarged manner in FIG.

Each of the three space portions 6a, 6b, 6c which are vertically separated from the evaporator 6 is
Heat transfer tubes 20a, 20b, and 20c are provided correspondingly, and the chilled water pipes 20 are connected so that cold water circulating and supplied to a cooling load (not shown) flows in the order of the lower space portion 6a, the middle space portion 6b, and the upper space portion 6c. It is connected.

The three space portions 6a and 6 of the evaporator 6
b, 6c, respectively, spreaders 18a, 18b, 18c
The refrigerant liquid supplied from the condenser 4 to the lower space portion 6a is supplied by the refrigerant pump 19 to the heat transfer tube 20c of the upper space portion 6c, the heat transfer tube 20b of the middle space portion 6b, and the lower space portion. The heat transfer tubes and the sprayer are arranged on the heat transfer tubes 20a of 6a so as to be sequentially scattered.

On the other hand, each of the three space portions 7a, 7b and 7c which are arranged vertically apart from each other in the absorber 7 also has
Heat transfer tubes 21a, 21b and 11c are provided correspondingly, so that cooling water radiated and cooled by a cooling tower or the like not shown flows in the order of the heat transfer tube 21a in the lower space portion 7a and the heat transfer tube 21b in the middle space portion 7b. Is provided with a cooling water pipe 21,
Further, the absorbing liquid pipe 11 is provided so that the absorbing liquid flowing out of the lower space part 7a reaches the low-temperature heat exchanger 9 via the heat transfer tube 11c of the upper space part 7c.

The three space portions 7a, 7 of the absorber 7
b and 7c are respectively spreaders 13a, 13b and 13c.
The concentrated absorption liquid supplied from the low-temperature regenerator 3 via the low-temperature heat exchanger 9 is provided with the heat transfer tube 11c of the upper space portion 7c, the heat transfer tube 21b of the middle space portion 7b, and the lower space. The heat transfer tubes and the spreader are disposed on the heat transfer tubes 21a of the portion 7a so as to be sequentially scattered.

The lower space portions 6a and 7a, the middle space portions 6b and 7b, and the upper space portions 6c and 7c of the evaporator 6 and the absorber 7 are juxtaposed, respectively. The vapor of the evaporated refrigerant is configured to be able to flow into each corresponding space portion of the absorber 7.

In the absorption refrigerator having the above-described structure, when the gas burner 2 is ignited and the high-temperature regenerator 1 heats and dilutes the rare absorbing liquid, the refrigerant vapor separated from the vapor evaporated from the rare absorbing liquid is separated from the refrigerant vapor. An intermediate absorbent having an increased concentration of the absorbent is obtained.

The high-temperature refrigerant vapor generated by the high-temperature regenerator 1 enters the low-temperature regenerator 3 through the refrigerant pipe 15 and is generated by the high-temperature regenerator 1 and passes through the high-temperature heat exchanger 10 by the absorption liquid pipe 12. Then, the intermediate absorbing liquid that has entered the low-temperature regenerator 3 is heated and condensed, and enters the condenser 4.

The refrigerant heated by the low-temperature regenerator 3 and separated by evaporation from the intermediate absorbing liquid enters the condenser 4 and enters the cooling water pipe 2.
The refrigerant exchanges heat with the water flowing in 1, condensed and liquefied, passes through the refrigerant pipe 17 together with the refrigerant condensed and supplied from the refrigerant pipe 16, and enters the lower space portion 6 a of the evaporator 6.

The refrigerant liquid that has entered the lower space portion 6a of the evaporator 6 and accumulated in the refrigerant liquid reservoir is pumped up by the refrigerant pump 19 and sprayed from the sprayer 18c onto the heat transfer tube 20c of the upper space portion 6c. Then, the water exchanges heat with water supplied through the cold water pipe 20, evaporates, and cools the water flowing inside the heat transfer pipe 20c.

The refrigerant that has not evaporated due to heat exchange with the water inside the upper heat transfer tube 20c accumulates at the bottom of the upper space portion 6c, and the heat transfer tube 20b provided in the lower middle space portion 6b therebelow. Is sprayed from the sprayer 18b, and also exchanges heat with water supplied through the cold water pipe 20, evaporates, and cools the water flowing inside the heat transfer pipe 20b.

The refrigerant that has not evaporated due to the heat exchange with the water inside the middle heat transfer tube 20b accumulates at the bottom of the middle space portion 6b, and the heat transfer tube 20a provided in the lower space portion 6a below it. Is sprayed from the sprayer 18a, and also exchanges heat with water supplied through the cold water pipe 20, evaporates, and cools the water flowing inside the heat transfer pipe 20a.

As described above, the water supplied from the cold water pipe 20 is supplied to the heat transfer pipes 20a, 20b, 20c inside the evaporator 6.
Each is cooled and circulated and supplied to a cooling load (not shown) to perform a cooling function.

Then, the isolated space portion 6 of the evaporator 6
The refrigerant evaporated in each of the a, 6b, and 6c flows into each of the space portions 7a, 7b, and 7c of the absorber 7 arranged in parallel in each space portion, and the refrigerant vapor entering the upper space portion 7c is regenerated at a low temperature. Liquid, which is heated in the vessel 3 to separate the refrigerant by evaporation, so that the concentration of the absorbing liquid is further increased, that is, the absorbing liquid pipe 13
Is supplied via the low-temperature heat exchanger 9 by the sprayer 13
c and is spread on the heat transfer tube 11c.

The rare absorbing liquid discharged from the lower space portion 7a and sent to the high-temperature regenerator 1 by the absorbing liquid pump 14 is flown into the heat transfer tube 11c, and the concentrated absorbing liquid is scattered outside the tube. Since the liquid is cooled, the space 6 in the evaporator 6
The vapor of the refrigerant that evaporates from a and enters is quickly absorbed by the concentrated absorbing liquid sprayed from the sprayer 13c.

The absorbing liquid which has absorbed the refrigerant vapor in the space portion 7c and accumulated at the bottom of the upper space portion 7c is spread on the heat transfer tube 21b provided in the lower middle space portion 7b. Is cooled by the cooling water supplied through the cooling water pipe 21, and quickly absorbs the refrigerant vapor evaporating from the middle space portion 6 b of the evaporator 6 and enters the bottom of the space portion 7 b Accumulate.

The absorbing liquid that has absorbed the refrigerant vapor in the space portion 7b and accumulated at the bottom of the middle space portion 7b is spread on the heat transfer tube 21a provided in the lower space portion 7a below the sprayer 13a. Is cooled by the cooling water supplied from the cooling water pipe 21 through the cooling water pipe 21 and quickly absorbs refrigerant vapor evaporating from the lower space portion 6a of the evaporator 6 and entering the bottom of the space portion 7a. Accumulate.

As described above, the absorption liquid whose concentration has been reduced by repeatedly absorbing the refrigerant in each space portion of the absorber 7, that is, the diluted absorption liquid, is operated by the operation of the absorption liquid pump 14 so that the upper space of the absorber 7 is removed. Heat transfer tube 11c installed in part 7a
The heat is heated by the low-temperature heat exchanger 9 and the high-temperature heat exchanger 10, respectively, and sent to the high-temperature regenerator 1 from the absorption liquid pipe 11.

When the absorption chiller is operated as described above, the heat transfer tubes 20a, 20b, and 20c provided inside the space portions 6a, 6b, and 6c of the evaporator 6 generate heat by the vaporization heat of the refrigerant. The cooled cold water is supplied to the cold water pipe 20.
Can be circulated to an air-conditioning load (not shown) via the, so that a cooling operation such as cooling can be performed.

In the absorption refrigerator having the above-described structure, the space for installing the heat transfer tubes 11c through which the dilute absorption liquid having a small flow rate flows and the heat transfer tubes 21a and 21b through which the cooling water having a large flow rate flows is provided separately from each other. At the same time, a special sprayer is provided for each heat transfer tube, so that a sprayer of the optimal size can be installed for each heat transfer tube, and the refrigerant vapor is selectively supplied to the place where the heat transfer tube with high performance is installed. I never said that. Therefore, heat exchange between the fluids located inside and outside the heat transfer tubes is efficiently performed.

Then, the rare absorbing liquid conveyed from the absorber 7 to the high-temperature regenerator 1 by the absorbing liquid pump 14 is supplied to the heat transfer tube 1.
1c, the low-temperature heat exchanger 9 and the high-temperature heat exchanger 10 are each heated effectively, so that the temperature of the rare absorbing liquid when flowing into the high-temperature regenerator 1 is higher than in the case of the conventional absorption refrigerator. Thus, the fuel cost consumed by the gas burner 2 can be reduced.

That is, the absorption refrigerator of the first embodiment shown in FIGS. 1 and 2, the upper and middle space portions 7c and 7b of the absorber 7 and the upper stage of the evaporator 6 in the absorption refrigerator. In a conventional absorption refrigerator in which the inner space portions 6c and 6b are integrated with each other, and the spreaders in each space portion are only 13c and 18c, respectively, the During diagram thereof is as shown in FIG. In addition, since the absorption refrigerator of the first embodiment shown by the solid line has a larger concentration range between the concentrated absorption solution and the diluted absorption solution than the conventional absorption refrigerator shown by the broken line,
The COP (coefficient of performance) is improved.

[Second Embodiment] A second embodiment will be described with reference to FIG. In the absorption refrigerator of the second embodiment, a part of the water that has passed through the middle space 6b of the evaporator 6 passes through the upper space 6c, and the other water passes through the space 6c. A chilled water pipe 20 is provided so that it can be directly circulated and supplied to a cooling load (not shown) without being provided.

Also in the absorption type refrigerator having the above configuration, a dedicated sprayer is installed in each of the heat transfer tubes 11c through which the diluted absorption liquid with a small flow rate flows and the heat transfer tubes 21a and 21b with the cooling water flow with a large flow rate. Efficient heat exchange can be performed by installing a sprayer having a size matching the size of the heat transfer tube, and the rare absorbing liquid conveyed from the absorber 7 to the high-temperature regenerator 1 includes the heat transfer tube 11c and the low-temperature Since the heat is effectively heated in each of the heat exchanger 9 and the high-temperature heat exchanger 10, the temperature of the diluted absorbent when flowing into the high-temperature regenerator 1 becomes higher than in the case of the conventional absorption refrigerator, and the gas burner is heated. 2 has the advantage that the fuel cost can be reduced.

Third Embodiment A third embodiment will be described with reference to FIG. In the absorption refrigerator of the third embodiment, the interior of the evaporator 6 is formed in two stages and the interior of the absorber 7 is formed in three stages, and the lower space portion 6a of the evaporator 6 is formed.
Is in the lower space 7a of the absorber 7, the upper space 6b of the evaporator 6 is the middle and upper space 7b of the absorber 7,
7c, a heat transfer tube and a sprayer are installed in pairs in each space portion, and the vapor of the refrigerant evaporated in the space portion 6a at the lower stage of the evaporator 6 is removed from the space at the lower stage of the absorber 7. In the portion 7a, the vapor of the refrigerant evaporated in the upper space portion 6b of the evaporator 6 is filled with the middle and upper space portions 7b, 7 of the absorber 7.
c.

Also in the absorption type refrigerator having this configuration, a dedicated sprayer is installed in each of the heat transfer tubes 11c through which the diluted absorption liquid with a small flow rate flows and the heat transfer tubes 21a and 21b through which the cooling water with a large flow rate flows. Efficient heat exchange can be performed by installing a sprayer having a size matching the size of the heat transfer tube, and the rare absorbing liquid conveyed from the absorber 7 to the high-temperature regenerator 1 includes the heat transfer tube 11c and the low-temperature Since the heat is effectively heated in each of the heat exchanger 9 and the high-temperature heat exchanger 10, the temperature of the diluted absorbent when flowing into the high-temperature regenerator 1 becomes higher than in the case of the conventional absorption refrigerator, and the gas burner is heated. 2 has the advantage that the fuel cost can be reduced.

[Fourth Embodiment] A fourth embodiment will be described with reference to FIG. In the absorption refrigerator of the fourth embodiment, the interior of the evaporator 6 and the interior of the absorber 7 are both formed in two stages, and a heat transfer tube and a sprayer are installed in a pair in each space, The vapor of the refrigerant evaporated in the lower space 6a of the evaporator 6 is transferred to the lower space 7a of the absorber 7,
The vapor of the refrigerant evaporated in the upper space 6b of the evaporator 6 flows into the upper space 7b of the absorber 7 respectively.

In the absorption refrigerator having the above-described structure, a dedicated sprayer is provided for each of the heat transfer tube 11c through which the diluted absorbent having a small flow rate flows and the heat transfer tube 21a through which the cooling water with a large flow rate flows. The heat exchange can be performed efficiently by installing a sprayer having a size that matches the size of the heat transfer tube 11c and the low-temperature heat exchange from the absorber 7 to the high-temperature regenerator 1. Vessel 9 ・ High temperature heat exchanger 10
Since each of them is heated effectively, the temperature of the diluted absorption liquid when flowing into the high-temperature regenerator 1 becomes higher than in the case of the absorption refrigerator of the prior art, and the fuel cost consumed by the gas burner 2 can be suppressed. There is an advantage that it can be done.

Since the present invention is not limited to the above embodiment, various modifications can be made without departing from the spirit of the invention.

For example, the absorption chiller may perform a cooling operation such as cooling only as described above,
The refrigerant vapor heated and generated by the high-temperature regenerator 1 and the absorption liquid obtained by evaporating and separating the refrigerant vapor are connected to the low-temperature body 8 so that the refrigerant vapor can be directly supplied to the low-temperature body 8. The liquid is heated, and water heated to, for example, about 55 ° C. by the heat transfer tubes 20 a, 20 b, and 20 c of the evaporator 6 is loaded through a cold water pipe (preferably called a hot water pipe when hot water circulates) 20. The heater may be circulated so that a heating operation such as heating can be performed.

As the fluid to be supplied to the air-conditioning load after being cooled by the evaporator 6, water or the like is supplied without changing the phase as in the above-described embodiment, and heat transfer utilizing latent heat can be performed. May be supplied with a phase change of fluorocarbon or the like.

[0045]

As described above, in the absorption refrigerator of the present invention, the space between the heat transfer tube through which the rare absorption liquid with a small flow rate flows and the heat transfer tube through which the cooling water with a large flow rate flows is installed. Since they are provided separately from each other, the vapor of the refrigerant supplied from the evaporator is never selectively supplied to a place where a heat transfer tube with high performance is installed.

Further, since each heat transfer tube is provided with a dedicated sprayer, a sprayer of an optimum size is provided for each of the heat transfer tubes to improve the heat exchange efficiency between fluids located inside and outside the heat transfer tubes. Fuel consumption because the temperature of the diluted absorbing liquid conveyed from the absorber to the high-temperature regenerator becomes higher than in the case of the absorption refrigerator of the prior art, and the required heating amount in the high-temperature regenerator is reduced. Can be suppressed.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a first embodiment.

FIG. 2 is an explanatory diagram showing a main part of the first embodiment.

FIG. 3 is a During diagram of the present invention and the prior art.

FIG. 4 is an explanatory diagram showing a main part of a second embodiment.

FIG. 5 is an explanatory diagram showing a main part of a third embodiment.

FIG. 6 is an explanatory diagram showing a main part of a fourth embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 High temperature regenerator 2 Gas burner 3 Low temperature regenerator 4 Condenser 5 High temperature body 6 Evaporator 6a (lower) space part 6b (middle) space part 6c (upper) space part 7 Absorber 7a (lower) space part 7b (middle stage) space portion 7c (upper stage) space portion 8 low-temperature shell 9 low-temperature heat exchanger 10 high-temperature heat exchanger 11-13 absorbent liquid pipe 11c heat transfer pipe 13a, 13b, 13c sprayer 14 absorbent liquid pump 15-18 Refrigerant pipe 18a, 18b, 18c Sprayer 19 Refrigerant pump 20 Cold water pipe 20a, 20b, 20c Heat transfer pipe 21 Cooling water pipe 21a, 21b Heat transfer pipe

 ──────────────────────────────────────────────────続 き Continued on the front page (71) Applicant 000221834 Toho Gas Co., Ltd. 19-18, Sakuradacho, Atsuta-ku, Nagoya-shi, Aichi (72) Inventor Masahiro Furukawa 2-5-5-1 Keihanhondori, Moriguchi-shi, Osaka 3 (72) Inventor Toshihiro Yamada 2-5-2-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Inventor Kazuyasu Irami 2-5-2, Keihanhondori, Moriguchi-shi, Osaka No. 5 Inside Sanyo Electric Co., Ltd. (72) Inventor Masaru Edera 4-3-9, Ichikawa, Ichikawa-shi, Chiba Prefecture (72) Inventor Toshikuni Ohashi 1-1-1-407, Sakasegawa, Takarazuka-shi, Hyogo (72) Invention Person Atsushi Tajima 2F term of 507 Shinbocho, Tokai City, Aichi Prefecture (reference) 3L093 AA01 BB12 BB13 BB22 BB29 BB31 BB32 LL03 MM02

Claims (7)

[Claims] 1. A plurality of space portions for absorbing refrigerant vapor supplied from an evaporator into an absorbing liquid supplied from a regenerator are vertically separated from each other, and are discharged from a lowermost space portion to generate a high temperature. An absorption refrigerator comprising a multi-stage absorber in which a heat transfer tube through which an absorption liquid supplied to a regenerator flows is provided in an uppermost space portion. 2. A multi-stage absorber having three spatial portions, wherein an upper spatial portion formed in the upper spatial portion and separated into three stages of an evaporator is separated from the evaporator by an absorber. In the upper space portion of the multi-stage absorber, dispersing means for dispersing the absorbing liquid supplied from the regenerator on the heat transfer tube is provided in the upper space portion of the multi-stage absorber, 2. An absorption refrigeration system according to claim 1, wherein a heat transfer tube through which the fluid to be cooled flows is provided in an upper space portion of the vessel, and a refrigerant liquid sprayed on the heat transfer tube evaporates. Machine. 3. A multistage absorber having three stages of said space portion, wherein a middle space portion formed in the middle space portion and separated into three stages of the evaporator is separated from the evaporator by an absorber. In the middle space of the multi-stage absorber, cooling water flows along with the heat transfer tube, and the absorbing liquid supplied by absorbing the refrigerant from the upper space is supplied to the heat transfer tube. A heat transfer pipe through which the fluid to be cooled flows is provided in the middle space of the evaporator, and the refrigerant liquid supplied and sprayed from the upper space evaporates on the heat transfer pipe. The absorption refrigerator according to claim 1, wherein the absorption refrigerator is configured as described above. 4. A multi-stage absorber having three stages of said space portion, wherein a lower space portion formed in the lower space portion and separated from the three stages of the evaporator is separated from the evaporator by an absorber. And a heat transfer tube through which cooling water flows inside the lower stage space portion of the multi-stage absorber, and an absorption liquid supplied by absorbing the refrigerant from the middle space portion to the heat transfer tube. A heat transfer pipe through which the fluid to be cooled flows is provided in the lower space portion of the evaporator, and the refrigerant liquid supplied and sprayed from the middle space portion evaporates on the heat transfer tube. The absorption refrigerator according to claim 1, wherein the absorption refrigerator is configured as described above. 5. A multi-stage absorber having three spatial portions, wherein an upper spatial portion formed in two upper stages of an evaporator in an upper spatial portion and a middle spatial portion is subjected to evaporation. Dispersing means for juxtaposing the heat transfer tube and the absorbing liquid supplied from the regenerator on the heat transfer tube together with the heat transfer tube in the upper space of the multistage absorber, in parallel with each other so that the refrigerant vapor can flow into the absorber from the heat absorber. In the middle space portion of the multi-stage absorber, together with the heat transfer tube through which the cooling water flows, a spraying means for absorbing the refrigerant supplied from the upper space portion and supplying the absorbing liquid onto the heat transfer tube is provided. 2. The heat transfer pipe according to claim 1, wherein a heat transfer pipe through which a fluid to be cooled flows is provided in an upper space portion of the evaporator, and a refrigerant liquid sprayed on the heat transfer pipe evaporates. Absorption refrigerator. 6. A multi-stage absorber having two stages of said space portions, an upper space portion and a lower space portion of a space portion separated and formed in two stages of an evaporator in an upper space portion and a lower space portion thereof. The parts are arranged side by side so that refrigerant vapor can flow from the evaporator to the absorber, and the absorption liquid supplied from the regenerator is placed on the heat transfer tubes together with the heat transfer tubes in the upper space of the multi-stage absorber. A spraying means for spraying is provided, and in the lower space portion of the multi-stage absorber, together with the heat transfer tube through which the cooling water flows, the absorbing liquid supplied by absorbing the refrigerant from the upper space portion is sprayed onto the heat transfer tube. And a heat transfer tube through which the fluid to be cooled flows is provided in each of the upper space portion and the lower space portion of the evaporator, so that the refrigerant liquid sprayed on these heat transfer tubes evaporates. The absorption refrigerator according to claim 1, wherein: 7. A cooling fluid path is provided such that the cooling fluid flows into the evaporator from a lower space portion and is discharged through a space portion above the lower space portion. 7. The absorption refrigerator according to any one of 2 to 6.